My Candles Are Stored in a Non-Air-Conditioned Warehouse in Pune — What Conditions Should I Monitor to Protect Fragrance Quality?

What actually matters in a non-AC warehouse

Plenty of candle businesses in Pune store stock without air conditioning, and many of them do so without trouble. The ones that run into fragrance complaints usually share one habit: they know the city's weather but not the temperature on their own shelves. A warehouse in the same city can hold one rack comfortably and cook another, depending on the roof, the walls, the door and the sun.

So the honest answer to "what should I monitor" is a short list, measured where the stock actually sits, and acted on. Here it is, in order of how much it usually matters for fragrance.

1. Temperature at each storage position

Not the room average, not the forecast — the temperature at the shelf. Warmth speeds the loss of lighter top notes and can make soy wax soften, sweat or develop its own odour. Record the daily minimum and maximum at every distinct position: low racks, middle racks, the top tier, near the door, near any window.

2. Direct sunlight and strong light

Light, along with heat and oxygen, is one of the usual drivers of fragrance change. Note any position that gets direct sun through a window, skylight or open shutter at any time of day, and how many hours. Sunlit spots also run hotter.

3. Heat sources

A tin or metal roof, a west-facing wall in the afternoon, a generator, a compressor, a kitchen or a hot-water line next door can all create local hot spots. Map them.

4. Humidity — for packaging, not fragrance

Monsoon humidity matters, but be clear about why. It mainly affects cartons, labels and inserts — softening, warping, staining, mould on board, condensation on glass when cool stock meets humid air. It does not, by itself, explain a fragrance getting weaker. Monitor it to protect your packaging, and look elsewhere when the scent changes.

5. How long each batch has been there

Time is a driver in its own right. A cool shelf does not make stock ageless. Track the batch code and the date each carton went onto the shelf, so the oldest stock leaves first.

6. Where the fragrance oil itself is kept

If your oil stock shares the warehouse, it needs the same monitoring — and ideally the coolest, darkest position you have, sealed and upright, away from roofs, windows and heat sources. Our oil pages publish no storage temperature, so ask on WhatsApp (+91 7397976926) for storage guidance on the specific oil and lot and keep the reply in writing.

Tools for monitoring

A min/max thermometer at each position is the minimum. It tells you the hottest and coolest the shelf reached since you last reset it, which is far more useful than a spot reading at 10 am. A small temperature-and-humidity data logger is better still, because it shows when and for how long a shelf was hot.

Be clear about what we sell. Our Pen Thermometer (₹354.00) is a tool for wax and fragrance-addition temperatures during production; we do not sell min/max thermometers or data loggers, so source those separately. Our product page does not publish the pen thermometer's range or accuracy.

Place each thermometer where a carton would sit, at the same height, not on the wall beside the rack or near the door frame. Keep it out of direct sun, or it will report the sun on its own casing rather than the air around your stock. If you can only afford a few, put them on the top tier, the lowest tier and the spot you suspect is hottest; add more once the first readings show where the differences are.

Run the readings for at least a full week before drawing conclusions, and ideally through your hottest month. A single cool week in March tells you little about May.

The monitoring log

Keep one sheet for the whole warehouse, filled in on the same day each week from the daily readings. The template below shows the fields; the example entries are illustrative.

The last row is what turns monitoring into evidence. Keep two or three retained candles from a current batch at your hottest position and the same number at your coolest. At test points you choose — monthly is a reasonable starting point — compare them blind against each other and burn one of each, attended. If nobody can tell them apart, your warehouse is coping for the period tested.

What is sitting on those shelves

Put a figure on it, because it changes how seriously the monitoring is taken. Suppose, as an example, you hold 600 finished 200 g candles and sell 200 a month. That is 600 ÷ 200 = 3 months of stock. At 8% of total candle weight, each candle carries 16 g of fragrance, so the stock holds 600 × 16 g = 9,600 g of oil. If that oil is CSI Lavender at the 1 kg pack price, its cost alone is 9.6 × ₹5,221.00 = ₹50,121.60.

Fifty thousand rupees of fragrance sitting through a Pune summer is worth a few thermometers and ten minutes a day. It is also a reason to look hard at the three months of stock. If your retained-candle checks have only covered six weeks, holding three months of a fragrance is ahead of your evidence; producing smaller runs more often keeps the oldest candle on the shelf younger.

Acting on what you find

Rearrange first. Put the most heat-sensitive lines — fresh citrus, light florals — in the coolest positions, and keep fragrance oil stock in the coolest, darkest spot of all. Keep stock out of direct sun entirely.

Reduce the hot spots. Simple measures such as shading a window, moving stock away from a west wall, improving airflow or insulating under a roof can bring a hot position closer to the rest. Measure again after each change.

Shorten the hold. If the warehouse cannot be made cooler, make the stock younger: smaller, more frequent production runs and first-in, first-out dispatch.

Buy oil in step. At our listed prices the 1 kg pack is the cheapest per gram and no larger pack is listed, so ordering a month or two of oil at a time costs nothing extra per gram. Less oil waiting on a warm shelf is less oil ageing before it reaches a candle.

Then, only then, consider the formula. If retained candles at the hottest position still drift after storage is improved, test alternative oils or waxes side by side in that position. Buy 100 g samples first. Our fragrance-oil pages publish no shelf life, and our CSI 464 and CSI 468 wax pages' 60-month shelf life is a wax statement under cool, dry storage — it says nothing about fragrance on a hot shelf.

Where this page fits

CSI already has guides that cover parts of this question. This page answers one fragrance-ageing decision; these cover the neighbouring questions:

Three things to buy for this decision

Frequently asked questions